/*
 * Copyright 1997-2008 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

package forward.Libraries.javax.vecmath;

/**
 * A 4 element vector represented by double precision floating point x,y,z,w
 * coordinates.
 *
 */
public class Point4d extends Tuple4d implements java.io.Serializable {

	// Compatible with 1.1
	static final long serialVersionUID = 1733471895962736949L;

	/**
	 * Constructs and initializes a Point4d from the specified xyzw coordinates.
	 * 
	 * @param x the x coordinate
	 * @param y the y coordinate
	 * @param z the z coordinate
	 * @param w the w coordinate
	 */
	public Point4d(double x, double y, double z, double w) {
		super(x, y, z, w);
	}

	/**
	 * Constructs and initializes a Point4d from the coordinates contained in the
	 * array.
	 * 
	 * @param p the array of length 4 containing xyzw in order
	 */
	public Point4d(double[] p) {
		super(p);
	}

	/**
	 * Constructs and initializes a Point4d from the specified Point4d.
	 * 
	 * @param p1 the Point4d containing the initialization x y z w data
	 */
	public Point4d(Point4d p1) {
		super(p1);
	}

	/**
	 * Constructs and initializes a Point4d from the specified Point4f.
	 * 
	 * @param p1 the Point4f containing the initialization x y z w data
	 */
	public Point4d(Point4f p1) {
		super(p1);
	}

	/**
	 * Constructs and initializes a Point4d from the specified Tuple4f.
	 * 
	 * @param t1 the Tuple4f containing the initialization x y z w data
	 */
	public Point4d(Tuple4f t1) {
		super(t1);
	}

	/**
	 * Constructs and initializes a Point4d from the specified Tuple4d.
	 * 
	 * @param t1 the Tuple4d containing the initialization x y z w data
	 */
	public Point4d(Tuple4d t1) {
		super(t1);
	}

	/**
	 * Constructs and initializes a Point4d from the specified Tuple3d. The x,y,z
	 * components of this point are set to the corresponding components of tuple t1.
	 * The w component of this point is set to 1.
	 * 
	 * @param t1 the tuple to be copied
	 *
	 * @since vecmath 1.2
	 */
	public Point4d(Tuple3d t1) {
		super(t1.x, t1.y, t1.z, 1.0);
	}

	/**
	 * Constructs and initializes a Point4d to (0,0,0,0).
	 */
	public Point4d() {
		super();
	}

	/**
	 * Sets the x,y,z components of this point to the corresponding components of
	 * tuple t1. The w component of this point is set to 1.
	 * 
	 * @param t1 the tuple to be copied
	 *
	 * @since vecmath 1.2
	 */
	public final void set(Tuple3d t1) {
		this.x = t1.x;
		this.y = t1.y;
		this.z = t1.z;
		this.w = 1.0;
	}

	/**
	 * Returns the square of the distance between this point and point p1.
	 * 
	 * @param p1 the first point
	 * @return the square of distance between this point and point p1
	 */
	public final double distanceSquared(Point4d p1) {
		double dx, dy, dz, dw;

		dx = this.x - p1.x;
		dy = this.y - p1.y;
		dz = this.z - p1.z;
		dw = this.w - p1.w;
		return (dx * dx + dy * dy + dz * dz + dw * dw);
	}

	/**
	 * Returns the distance between this point and point p1.
	 * 
	 * @param p1 the first point
	 * @return the distance between these this point and point p1.
	 */
	public final double distance(Point4d p1) {
		double dx, dy, dz, dw;

		dx = this.x - p1.x;
		dy = this.y - p1.y;
		dz = this.z - p1.z;
		dw = this.w - p1.w;
		return Math.sqrt(dx * dx + dy * dy + dz * dz + dw * dw);
	}

	/**
	 * Computes the L-1 (Manhattan) distance between this point and point p1. The
	 * L-1 distance is equal to: abs(x1-x2) + abs(y1-y2) + abs(z1-z2) + abs(w1-w2).
	 * 
	 * @param p1 the other point
	 * @return the L-1 distance
	 */
	public final double distanceL1(Point4d p1) {
		return Math.abs(this.x - p1.x) + Math.abs(this.y - p1.y) + Math.abs(this.z - p1.z) + Math.abs(this.w - p1.w);
	}

	/**
	 * Computes the L-infinite distance between this point and point p1. The
	 * L-infinite distance is equal to MAX[abs(x1-x2), abs(y1-y2), abs(z1-z2),
	 * abs(w1-w2)].
	 * 
	 * @param p1 the other point
	 * @return the L-infinite distance
	 */
	public final double distanceLinf(Point4d p1) {
		double t1, t2;
		t1 = Math.max(Math.abs(this.x - p1.x), Math.abs(this.y - p1.y));
		t2 = Math.max(Math.abs(this.z - p1.z), Math.abs(this.w - p1.w));

		return Math.max(t1, t2);
	}

	/**
	 * Multiplies each of the x,y,z components of the Point4d parameter by 1/w,
	 * places the projected values into this point, and places a 1 as the w
	 * parameter of this point.
	 * 
	 * @param p1 the source Point4d, which is not modified
	 */
	public final void project(Point4d p1) {
		double oneOw;

		oneOw = 1 / p1.w;
		x = p1.x * oneOw;
		y = p1.y * oneOw;
		z = p1.z * oneOw;
		w = 1.0;

	}

}
